In January, the Sierra Club reversed a 121-year-old ban on civil disobedience to reflect the urgency of climate change. The move presents an opening for radical groups to try new tactics like the three discussed here.

Video: The Swinomish tribe could lose up to 15 percent of their land on low-lying Fidalgo Island to climate-change related sea level rise. They’re working with planners to make sure they can survive—and thrive—in the region’s changing climate.

Forty-eight leaders of environmentalist groups such as the Sierra Club, Friends of the Earth, and 350.org were arrested today while participating in civil disobedience. They were demanding that President Barack Obama stop construction of the Keystone XL Pipeline.

Two scientists at Columbia University believe that carbon-mopping machines modeled after trees could sequester enough carbon from the atmosphere to slow global warming. But can we produce them quickly (and cheaply) enough for the plan to work?

A divestment campaign led by students is changing the national conversation about energy, creating a market for sustainable stocks, and linking up students with communities facing off against the fossil fuel industry.

Many were surprised to hear President Barack Obama take up climate change at today’s inaugural address. Here are a few ways the president can seize the moment and transform our approach to climate action.